Battery pack and energy storage equipment

Abstract

The embodiment of the utility model relates to the technical field of batteries, and particularly discloses a battery pack and energy storage equipment, the battery pack comprises a plurality of battery modules, the plurality of battery modules are stacked along a first direction, each battery module comprises a plurality of side plates connected in sequence, and the periphery of one end, close to the adjacent battery module, of each side plate extends to form a connecting part; the supporting plates are arranged between the adjacent battery modules, and the supporting plates are positioned between the connecting parts of the side plates of the adjacent battery modules; a clamping groove is formed in the clamping piece, the clamping piece is clamped at the joint of the adjacent battery modules, the clamping piece is clamped at the connecting part of the adjacent battery modules and the edge of the supporting plate, and at least part of the connecting part of the adjacent battery modules is located in the clamping groove. In this way, the occupied space in the stacking direction of the multiple battery modules can be reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a battery pack and an energy storage device. BACKGROUND

[0002] In the related art, a battery pack is arranged in an energy storage cabinet, the battery pack includes a plurality of battery modules, each battery module is formed by connecting a plurality of battery monomers, in order to ensure the connection between the plurality of battery modules, a support table is usually arranged in the energy storage cabinet, the adjacent battery modules are connected through the support table, so that the plurality of battery modules are stacked in the energy storage cabinet.

[0003] The present application discloses a battery pack and an energy storage device. UTILITY MODEL CONTENT

[0004] In view of the above problems, the present application provides a battery pack and an energy storage device, which overcomes the above problems or at least partially solves the above problems.

[0005] According to one aspect of the present application, a battery pack is provided, which includes a plurality of battery modules, the plurality of battery modules are stacked in a first direction, each battery module includes a plurality of side plates connected in sequence, and each side plate extends a connecting portion near the peripheral edge of one end of the adjacent battery module; a support plate is arranged between the adjacent battery modules, and the support plate is located between the connecting portions of the side plates of the adjacent battery modules; a clamping piece is provided with a clamping groove, and the clamping piece is clamped at the connecting portion of the adjacent battery modules, the clamping piece is clamped at the connecting portion of the adjacent battery modules and the edge of the support plate, and the connecting portion of the adjacent battery modules is at least partially located in the clamping groove.

[0006] In an optional manner, the plurality of side plates of each battery module are connected in sequence to form a mounting cavity, and a battery group is arranged in the mounting cavity; the battery pack further includes a liquid cooling assembly, the liquid cooling assembly includes a liquid cooling plate, the liquid cooling plate is located between the adjacent battery modules, and the support plate supports one battery module through the liquid cooling plate, so as to cool the battery group in the battery module.

[0007] In an alternative mode, the liquid cooling plate comprises a liquid cooling channel, and a first liquid flow port and a second liquid flow port communicating with the liquid cooling channel; the liquid cooling assembly further comprises a first water pipe and a second water pipe, the first water pipe and the second water pipe are connected to the liquid cooling plate in a spaced manner, the first water pipe is connected to the first liquid flow port, and the second water pipe is connected to the second liquid flow port; the first water pipe and the second water pipe both communicate with the liquid cooling channel, one of the first liquid flow port and the second liquid flow port is an inlet, and the other is an outlet.

[0008] In an alternative mode, the liquid cooling plate is provided with a first connecting column and a second connecting column, the first liquid flow port is located at the first connecting column, and the second liquid flow port is located at the second connecting column; the first water pipe is connected to the first connecting column and communicates with the first liquid flow port, and the first water pipe and the first connecting column are sealed and matched by a first sealing ring; the second water pipe is connected to the second connecting column and communicates with the second liquid flow port, and the second water pipe and the second connecting column are sealed and matched by a second sealing ring.

[0009] In an alternative mode, the clamping piece comprises a first clamping plate, a second clamping plate and a third clamping plate, one end of the second clamping plate is connected to the first clamping plate, the other end of the second clamping plate is connected to the third clamping plate, and the clamping piece is in a U shape; the first clamping plate, the second clamping plate and the third clamping plate are matched with different edges of the support plate respectively.

[0010] In an alternative mode, the first clamping plate and the third clamping plate are elastic, and the first clamping plate and the third clamping plate are arranged at an inclined angle between the first clamping plate and the third clamping plate and the second clamping plate, and one end of the first clamping plate away from the second clamping plate and one end of the third clamping plate away from the second clamping plate are both inclined towards the direction of the clamping groove.

[0011] In an alternative mode, the support plate supports one of the adjacent battery modules through the liquid cooling plate and is fixed to the battery module; a limiting groove is arranged on the side of the support plate away from the liquid cooling plate, a limiting protrusion is arranged on the battery module close to the limiting groove, and when the adjacent battery modules are stacked, the limiting protrusion extends into the limiting groove to limit the adjacent battery modules.

[0012] In an alternative mode, the battery module further comprises an opening communicating with the mounting cavity, and the battery pack is mounted in the mounting cavity from the opening; the battery module further comprises a cover plate, the cover plate covers the opening, and the cover plate is connected with the plurality of side plates.

[0013] In an alternative mode, the cover plate is provided with a fixing groove near one side of the mounting cavity; the plurality of side plates are provided with fixing protrusions near one side of the cover plate, which are inserted into the fixing groove.

[0014] According to another aspect of the present application, there is provided an energy storage device comprising the battery pack as described above.

[0015] The beneficial effects of the embodiments of the present application are that, unlike the prior art, the embodiments of the present application are provided with a plurality of battery modules, support plates, and clamping pieces. The plurality of battery modules are stacked along a first direction, each battery module comprises a plurality of side plates connected in sequence, each side plate extends a connecting portion near the periphery of one end of the adjacent battery module, the support plate is arranged between the adjacent battery modules, the support plate is located between the connecting portions of the side plates of the adjacent battery modules, the clamping piece is provided with a clamping groove, the clamping piece is clamped at the connecting portion between the adjacent battery modules, the clamping piece is clamped at the connecting portion of the adjacent battery module and the edge of the support plate, and the connecting portion of the adjacent battery module is at least partially located in the clamping groove. In this way, the support plate serves as the bottom plate of one of the battery modules and as the top plate of another battery module. By using the support plate as a common plate for the adjacent battery modules, the use of additional supporting tables to connect the adjacent battery modules can be reduced. At the same time, the clamping piece is used to clamp and fix the adjacent battery modules, thereby ensuring the stability of the connection between the adjacent battery modules. The technical solution of the present application can reduce the space occupied in the stacking direction of the plurality of battery modules, thereby increasing the number of battery modules that can be installed in an energy storage device of the same volume, and thereby improving the energy density of the battery pack. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the specific embodiments or the prior art, the drawings needed in the following description of specific embodiments or the prior art will be briefly introduced. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual proportions.

[0017] Figure 1 is a partial structure diagram of the battery pack of the embodiments of the present application;

[0018] Figure 2 is a partial structure diagram of the battery pack of the embodiments of the present application;

[0019] Figure 3 is a partial structure diagram of the battery pack of the embodiments of the present application;

[0020] Figure 4 is Figure 3 is an enlarged diagram of the structure at A in

[0021] Figure 5 isFigure 3 A structure enlarged schematic view at B;

[0022] Figure 6 is another side sectional view of the partial structure of the battery pack of the embodiment of the present application;

[0023] Figure 7 is a state schematic view of the partial structure of the battery pack of the embodiment of the present application;

[0024] Figure 8 is another state schematic view of the partial structure of the battery pack of the embodiment of the present application;

[0025] Figure 9 is another side sectional view of the partial structure of the battery pack of the embodiment of the present application;

[0026] Figure 10 is Figure 9 A structure enlarged schematic view at C;

[0027] Figure 11 is Figure 9 A structure enlarged schematic view at D. DETAILED DESCRIPTION

[0028] In order to facilitate the understanding of the present application, the present application will be described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that when an element is described as "fixed to" another element, it can be directly on the other element or one or more intervening elements can be present therebetween. When an element is described as "connected to" another element, it can be directly connected to the other element or one or more intervening elements can be present therebetween. The terms "vertical", "horizontal", "left", "right", and similar expressions used in the present specification are for the purpose of illustration only.

[0029] Unless otherwise defined, all technical and scientific terms used in the present specification are the same as those commonly understood by one skilled in the art to which the present application belongs. The terms used in the present specification are only for the purpose of describing specific embodiments of the present application and are not intended to limit the present application. The term "and / or" used in the present specification includes any and all combinations of one or more related listed items.

[0030] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as there is no conflict between them.

[0031] Please refer to Figure 1 and Figure 2The battery pack 1000 comprises the battery module 10, the support plate 20, the clamping piece 30 and the liquid cooling assembly 40. The battery module 10 is in a plurality of numbers, and the plurality of battery modules 10 are arranged in a stacking mode along a first direction. The support plate 20 is arranged between adjacent battery modules 10. The clamping piece 30 is used for clamping and fixing adjacent battery modules 10. The liquid cooling assembly 40 is used for heat dissipation of the battery pack 10b in the battery module 10. The battery module 10, the support plate 20, the clamping piece 30 and the liquid cooling assembly 40 are described in detail below.

[0032] As shown in FIGS. 1, 2 and 3, the plurality of battery modules 10 are arranged in a stacking mode along a first direction. Each battery module 10 comprises a plurality of side plates 101 connected in sequence. Each side plate 101 extends a connecting portion 1011 near the periphery of one end of an adjacent battery module 10. The support plate 20 is arranged between adjacent battery modules 10. The support plate 20 is located between the connecting portions 1011 of the side plates 101 of adjacent battery modules 10. The support plate 20 serves as the bottom plate of one of the battery modules 10 and as the top plate of another of the battery modules 10. The support plate 20 is used as a common plate of adjacent battery modules 10, which reduces the use of additional supporting tables to connect adjacent battery modules 10 and reduces the space occupied in the stacking direction of the plurality of battery modules 10. Thus, the number of battery modules 10 that can be installed in an energy storage device of the same volume is increased, which is conducive to improving the energy density of the battery pack 1000. It should be noted that the first direction refers to the vertical direction. Figure 2 Figure 3 It should be noted that the number of support plates 20 is also in a plurality of numbers, and the number of support plates 20 can be correspondingly arranged according to the number of battery modules 10. For example, when the number of battery modules 10 is four, the number of support plates 20 is three, as long as one support plate 20 is arranged between adjacent battery modules 10.

[0033] In some embodiments, each battery module 10 further comprises a mounting cavity 10a and a battery pack 10b located in the mounting cavity 10a. The mounting cavity 10a is formed by a plurality of side plates 101 connected in sequence. It can be understood that the connection mode between the plurality of side plates 101 includes but is not limited to welding, screwing, riveting, clamping and the like.

[0034] In some embodiments, the battery module 10 further comprises an opening 10c communicating with the mounting cavity 10a. The battery pack 10b is installed in the mounting cavity 10a from the opening 10c. The battery module 10 further comprises a cover plate 102 covering the opening 10c. The cover plate 102 is connected with the plurality of side plates 101. The cover plate 102 can reduce the entry of external rainwater and dust into the mounting cavity 10a, thereby reducing the impact on the battery pack 10b.

[0035] In some embodiments, the battery module 10 further comprises an opening 10c communicating with the mounting cavity 10a. The battery pack 10b is installed in the mounting cavity 10a from the opening 10c. The battery module 10 further comprises a cover plate 102 covering the opening 10c. The cover plate 102 is connected with the plurality of side plates 101. The cover plate 102 can reduce the entry of external rainwater and dust into the mounting cavity 10a, thereby reducing the impact on the battery pack 10b.

[0036] ​In some embodiments, please refer to Figure 4 The cover plate 102 is provided with a fixing groove 1021 on the side close to the mounting cavity 10a, and the plurality of side plates 101 are provided with fixing protrusions 1012 on the side close to the cover plate 102, the fixing protrusions 1012 are inserted into the fixing groove 1021, thereby realizing the connection between the cover plate 102 and the side plates 101. In addition, in order to ensure the sealing performance of the connection between the cover plate 102 and the side plates 101, the fixing groove 1021 can be filled with sealant, and then the fixing protrusions 1012 are inserted into the fixing groove 1021 to realize the connection between the cover plate 102 and the side plates 101.

[0037] In some embodiments, please refer to Figure 5 The support plate 20 supports one of the adjacent battery modules 10 through the liquid cooling plate 401 in the liquid cooling assembly 40 and is fixed to the battery module 10. The side of the support plate 20 away from the liquid cooling plate 401 is provided with a limiting groove 201, and the battery module close to the limiting groove 201 is provided with a limiting protrusion 10111. When the adjacent battery modules 10 are stacked, the limiting protrusion extends into the limiting groove 201 to limit the adjacent battery modules 10. In some embodiments, the limiting protrusion 10111 is located on the connecting portion 1011.

[0038] For the above-mentioned clamping piece 30, as shown in Figure 1 , Figure 2 and Figure 5 , the clamping piece 30 is provided with a clamping groove 30a, and the clamping piece 30 is clamped to the connecting portion 1011 of the adjacent battery module 10 and the edge of the support plate 20. The connecting portion 1011 of the adjacent battery module 10 is at least partially located in the clamping groove 30a, thereby realizing the connection between the adjacent battery modules 10. The clamping piece 30 can clamp the connecting portion 1011 on the adjacent battery module 10, so that the adjacent battery modules 10 are close to each other in the stacking direction. Therefore, the clamping piece 30 can reduce the size of the plurality of battery modules 10 in the stacking direction. It should be noted that the number of clamping pieces 30 is multiple, and each clamping piece 30 is clamped to the connecting portion of the adjacent battery module 10. The number of clamping pieces 30 can be set according to the number of battery modules 10, which is not limited in the present application.

[0039] In some embodiments, the clamping piece 30 comprises a first clamping plate 301, a second clamping plate 302, and a third clamping plate 303, one end of the second clamping plate 302 is connected to the first clamping plate 301, and the other end of the second clamping plate 302 is connected to the third clamping plate 303, the clamping piece 30 is in a U shape, and the first clamping plate 301, the second clamping plate 302, and the third clamping plate 303 are respectively matched with different edges of the support plate. Among them, the first clamping plate 301 and the third clamping plate 303 are respectively clamped on the first side (not marked) and the second side (not marked) of the connection between adjacent battery modules 10, and the second clamping plate 302 is clamped on the third side (not marked) of the connection between adjacent battery modules 10, the first side and the second side are oppositely arranged along the third direction Y, and the third side is located between the first side and the second side.

[0040] In some embodiments, the second clamping plate 302 is further provided with a connecting hole 3021, and a screw can be screwed through the connecting hole 3021 to the support plate 20, so as to realize the relative fixation between the clamping piece 30 and the support plate 20.

[0041] In some embodiments, the first clamping plate 301 and the third clamping plate 303 are elastic, and the first clamping plate 301 and the third clamping plate 303 are arranged at an inclined angle with the second clamping plate 302, and the end of the first clamping plate 301 away from the second clamping plate 302 and the end of the third clamping plate 303 away from the second clamping plate 302 are both inclined towards the direction of the clamping groove 30a. In this way, when the clamping piece 30 is clamped on the connection between adjacent battery modules 10, the first clamping plate 301 and the third clamping plate 303 gradually clamp the connection, so as to ensure that the connection between adjacent battery modules 10 is more firm. It can be understood that the inclined angle between the first clamping plate 301 and the third clamping plate 303 and the second clamping plate 302 is not limited in the present application, as long as the clamping piece 30 can tightly clamp the connection between adjacent battery modules 10.

[0042] For the above-mentioned liquid cooling assembly 40, such as Figure 2 and Figure 6As shown, the liquid cooling assembly 40 includes a liquid cooling plate 401, a first water pipe 402 and a second water pipe 403. The liquid cooling plate 401 is arranged on the side of the support plate 20 close to the battery pack 10b, and at least partially located in the mounting cavity 10a. The battery pack 10b abuts against the liquid cooling plate 401. The liquid cooling plate 401 includes a liquid cooling channel 401a, and a first liquid flow port 401b and a second liquid flow port 401c communicating with the liquid cooling channel 401a. The first water pipe 402 and the second water pipe 403 are both communicated with the liquid cooling channel 401a. The first water pipe 402 and the second water pipe 403 are spaced apart from the liquid cooling plate 401. The first water pipe 402 is connected to the first liquid flow port 401b, and the second water pipe 403 is connected to the second liquid flow port 401c. The cooling liquid can flow into the first liquid flow port 401b or the second liquid flow port 401c from the first water pipe 402 or the second water pipe 403. The cooling liquid flows through the liquid cooling channel 401a, carries away the heat generated by the battery pack 10b, and flows out from the second water pipe 403 or the second water pipe 403, thereby achieving heat dissipation for the battery pack 10b. It can be understood that the first liquid flow port 401b can be an inlet or an outlet, and the second liquid flow port 401c can be an inlet or an outlet. One of the first liquid flow port 401b and the second liquid flow port 401c is an inlet, and the other is an outlet. The liquid cooling channel 401a can be one liquid cooling channel 401a or two or more independent liquid cooling channels 401a. In this application, no specific limitation is made as long as the liquid cooling assembly 40 can achieve heat dissipation for the battery pack 10b.

[0043] In some embodiments, the first water pipe 402 and the second water pipe 403 are both made of metal, which can withstand a liquid pressure greater than that of a conventional water pipe, and is conducive to the flow of the cooling liquid.

[0044] In some embodiments, referring to Figure 7 and Figure 8 , the first water pipe 402 on one battery module 10 is communicated with the second water pipe 403 on the adjacent battery module 10, the second water pipe 403 on the adjacent battery module 10 is communicated with the first water pipe 402 on the other adjacent battery module 10, and so on, forming an independent liquid flow path in the shape of M. Similarly, the second water pipe 403 on one battery module 10 is communicated with the first water pipe 402 on the adjacent battery module 10, the first water pipe 402 on the adjacent battery module 10 is communicated with the second water pipe 403 on the other adjacent battery module 10, and so on, forming another independent liquid flow path in the shape of M. In this way, the two independent liquid flow paths are used to achieve heat dissipation for the multiple battery modules 10, thereby reducing the mutual interference between the liquid flow paths, and improving the heat dissipation effect of the liquid cooling assembly 40.

[0045] In some embodiments, referring to Figure 9- Figure 11In order to complete the connection between the first water pipe 402, the second water pipe 403 and the liquid cooling plate 401, the liquid cooling plate 401 is provided with a first connecting column 4011 and a second connecting column 4012, the first liquid flow port 401b is located on the first connecting column 4011, the second liquid flow port 401c is located on the second connecting column 4012, the first water pipe 402 is connected to the first connecting column 4011 and communicates with the first liquid flow port 401b, the first water pipe 402 abuts against the first limiting portion 40111 on the first connecting column 4011, the second water pipe 403 is connected to the second connecting column 4012 and communicates with the second liquid flow port 401c, the second water pipe 403 abuts against the second limiting portion 40121 on the second connecting column 4012, the connection between the first water pipe 402 and the first connecting column 4011 and the connection between the second water pipe 403 and the second connecting column 4012 are used to complete the connection between the first water pipe 402, the second water pipe 403 and the liquid cooling plate 401.

[0046] In some embodiments, the outer side wall of the first connecting column 4011 is provided with a first connecting groove 40112, the outer side wall of the second connecting column 4012 is provided with a second connecting groove 40122, the inner wall of the first water pipe 402 is provided with a first hook 4021, the first hook 4021 is clamped in the first connecting groove 40112, so as to realize the connection between the first water pipe 402 and the first connecting column 4011, the inner wall of the second water pipe 403 is provided with a second hook 4031, the second hook 4031 is clamped in the second connecting groove 40122, so as to realize the connection between the second water pipe 403 and the second connecting column 4012. It can be understood that the connection mode between the first water pipe 402 and the first connecting column 4011 and the connection mode between the second water pipe 403 and the second connecting column 4012 are not limited to the clamping mode, but can also be other modes, such as threaded connection, glue connection, welding and the like.

[0047] In some embodiments, the liquid cooling assembly 40 further comprises a first sealing ring 404 and a second sealing ring 405, the first sealing ring 404 is sleeved on the first connecting column 4011, the first sealing ring 404 is located between the first water pipe 402 and the first limiting portion 40111, the first water pipe 402 and the first connecting column 4011 are sealingly matched through the first sealing ring 404, the first sealing ring 404 can ensure the sealing property of the connection between the first water pipe 402 and the first connecting column 4011, so as to reduce the situation of liquid leakage, the second sealing ring 405 is sleeved on the second connecting column 4012, the second sealing ring 405 is located between the second water pipe 403 and the second limiting portion 40121, the second water pipe 403 and the second connecting column 4012 are sealingly matched through the second sealing ring 405, the second sealing ring 405 can ensure the sealing property of the connection between the second water pipe 403 and the second connecting column 4012, so as to reduce the situation of liquid leakage.

[0048] In the embodiment of the present application, a plurality of battery modules 10, a support plate 20 and a clamping piece 30 are arranged. The plurality of battery modules 10 are arranged in a first direction, each battery module 10 comprises a plurality of side plates 101 connected in sequence, each side plate 101 extends a connecting portion 1011 near the periphery of one end of the adjacent battery module 10, the support plate 20 is arranged between the adjacent battery modules 10, the support plate 20 is located between the connecting portions 1011 of the side plates 101 of the adjacent battery modules 10, the clamping piece 30 is provided with a clamping groove 30a, the clamping piece 30 is clamped at the connecting portion 1011 of the adjacent battery modules 10, the clamping piece 30 is clamped at the connecting portion 1011 of the adjacent battery modules 10 and the edge of the support plate 20, and the connecting portion 1011 of the adjacent battery modules 10 is at least partially located in the clamping groove 30a. In this way, the support plate 20 serves as the bottom plate of one of the battery modules 10 and as the top plate of another of the battery modules 10. The support plate 20 is used as a common plate of the adjacent battery modules 10, which can reduce the use of additional supporting tables to connect the adjacent battery modules 10. At the same time, the clamping piece 30 is used to clamp and fix the adjacent battery modules 10, thereby ensuring the stability of the connection between the adjacent battery modules 10. The technical scheme of the present application can reduce the space occupied in the stacking direction of the plurality of battery modules 10, thereby increasing the number of battery modules 10 that can be installed in the energy storage device of the same volume, and thereby improving the energy density of the battery pack 1000.

[0049] The present application also provides an embodiment of an energy storage device, which comprises the battery pack 1000 as described above. The functions and structures of the battery pack 1000 can be referred to the above-mentioned embodiments, which will not be repeated here. It can be understood that the energy storage device includes but is not limited to an energy storage cabinet, an outdoor power supply, an electric vehicle, etc.

[0050] The above-mentioned only for the embodiment of the present application, not therefore limit the patent scope of the present application, any equivalent structure or equivalent process transformation using the content of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A battery pack, characterized in that: include: A plurality of battery modules, wherein the plurality of battery modules are stacked along a first direction, each of the battery modules comprising a plurality of sequentially connected side panels, each of the side panels having a connecting portion extending from a periphery of one end adjacent to an adjacent battery module; A support plate is provided between adjacent battery modules, wherein the support plate is located between the connecting portions of the side plates of adjacent battery modules; A card connector is provided with a card slot, and the card connector is clamped at the connection between adjacent battery modules. The card connector is clamped to the connection part of the adjacent battery modules and the edge of the support plate, and the connection part of the adjacent battery modules is at least partially located in the card slot.

2. The battery pack according to claim 1, wherein: The plurality of side panels of each battery module are sequentially connected to form a mounting cavity, wherein a battery pack is arranged in the mounting cavity; The battery pack further includes a liquid cooling assembly, which includes a liquid cooling plate. The liquid cooling plate is located between adjacent battery modules. The support plate supports one of the battery modules through the liquid cooling plate to dissipate heat from the battery packs in the battery module.

3. The battery pack according to claim 2, wherein: The liquid cooling plate includes a liquid cooling channel and a first liquid flow port and a second liquid flow port communicating with the liquid cooling channel; The liquid cooling assembly further includes a first water pipe and a second water pipe, the first water pipe and the second water pipe are connected to the liquid cooling plate at intervals, the first water pipe is connected to the first liquid flow port, and the second water pipe is connected to the second liquid flow port; The first water pipe and the second water pipe are both connected to the liquid cooling channel. One of the first liquid flow port and the second liquid flow port is a liquid inlet, and the other is a liquid outlet.

4. The battery pack according to claim 3, wherein: The liquid cooling plate is provided with a first connecting column and a second connecting column, the first liquid flow port is located at the first connecting column, and the second liquid flow port is located at the second connecting column; The first water pipe is connected to the first connecting column and communicates with the first liquid flow port, and the first water pipe and the first connecting column are sealed by a first sealing ring; The second water pipe is connected to the second connecting column and communicates with the second liquid flow port. The second water pipe and the second connecting column are sealed by a second sealing ring.

5. The battery pack according to claim 1, wherein: The clamping member includes a first clamping plate, a second clamping plate and a third clamping plate, one end of the second clamping plate is connected to the first clamping plate, and the other end of the second clamping plate is connected to the third clamping plate, and the clamping member is U-shaped; the first clamping plate, the second clamping plate and the third clamping plate respectively cooperate with different edges of the support plate.

6. The battery pack according to claim 5, characterized in that: The first clip plate and the third clip plate are elastic, and are arranged at an inclined angle between the first clip plate and the third clip plate and the second clip plate. The end of the first clip plate away from the second clip plate and the end of the third clip plate away from the second clip plate are both inclined toward the card slot.

7. The battery pack according to claim 2, characterized in that: The support plate supports one of the adjacent battery modules through the liquid cooling plate and is fixed to the battery module; A limiting groove is provided on a side of the support plate away from the liquid cooling plate, and a limiting protrusion is provided on the battery module close to the limiting groove. When adjacent battery modules are stacked, the limiting protrusion extends into the limiting groove to limit the adjacent battery modules.

8. The battery pack according to claim 2, wherein: The battery module further includes an opening communicating with the mounting cavity, and the battery pack is mounted in the mounting cavity through the opening; The battery module further includes a cover plate, which is disposed on the opening and is connected to the plurality of side plates.

9. The battery pack according to claim 8, characterized in that: A fixing groove is provided on one side of the cover plate close to the installation cavity; A fixing protrusion is provided on one side of the plurality of side plates close to the cover plate, and the fixing protrusion is inserted into the fixing groove.

10. An energy storage device, characterized in that: A battery pack comprising any one of claims 1 to 9.

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